Average Americans cannot escape government surveillance of their car.
Law enforcement agencies across the country are tracking the movement of every vehicle with a license plate, according to a study published Wednesday by the American Civil Liberties Union.
The ACLU study reveals the surveillance has grown to millions of vehicles.
Automatic scanners are attached to police cars, bridges and buildings and sometimes as an app on an officer's smartphone. They capture images of passing and parked cars, keeping digital records of their location and movement.
That information is sent to a police database, where it's stored for weeks or even years.
"There's just a fundamental question of whether we're going to live in a society where these dragnet surveillance systems become routine," ACLU attorney Catherine Crump said.
Authorities say they use the surveillance system to track suspicious vehicles, carry out drug busts and find abducted children.
But the ACLU says it's a violation of privacy. They're calling on law enforcement agencies to delete records of all cars not involved in a crime.